Trading calculator

ABSTRACT

The specification discloses a hand-held electronic calculator for use by traders for rapidly and easily determining trade order size(s), number of option(s) or contract(s), and other unknown/or not stored variables for an option(s) trade, and a variety of margin, percentage, cash flow, and rate-of-return calculations. These “hand-held” electronic calculators for trading have a variety of product lines and models (e.g. pocket, hand-held, and desktop) and will be for “traders of all levels . . . trading securities of all types”. These innovative hand-held calculators allow traders worldwide to be fast, proactive, prepared, and informed . . . enabling them to increase productivity and profits. Trade order sizes can be determined for stocks, options, bonds, mutual funds, futures, indexes, currency, commodities, or any other security in the world that is traded using price and buying power as variables to compute trade order size. In addition, the number of option(s) or contract(s) can be determined quickly using pre-set cash amount(s), premium, and multiplier. Price/or premium and buying power are entered by the user, and they can then quickly scroll up/down through order size(s) or number of contract(s) by price/or premium in a range, with a variety of decimal/or fractional increments on “speed keys”. The hand-held calculator determines variables that are used during active trading (e.g. order sizes, number of contracts, option variables), and non-active trading (e.g. internal rate-of-return, financial mgmt rate of return, yield, gain/loss on sale, total dividends, etc.). The Trading Calculator has “Order Size”, “Options”, “Rate-of-Return”, and “Standard Calculator” modes.

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority from U.S. provisional application Nos. 60/265,070, filed Jan. 31, 2001; and 60/402,559 filed Aug. 12, 2002; both of which are incorporated herein in their entirety by reference. Additional references are cited below: U.S. Patent Documents 4081859 March 1978 Goldsamt, et al. 364/709 4545022 October 1985 Hughins 364/709 4744044 May 1988 Stover, et al. 364/737 4800514 January 1989 Earle 364/709 5025403 June 1991 Stephens 364/709 5089980 February 1992 Bunsen, et al. 364/709 5260886 November 1993 Bunsen 364/709

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH & DEVELOPMENT

[0002] Not Applicable.

REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM LISTING COMPACT DISK APPENDIX

[0003] Not Applicable.

BACKGROUND OF THE INVENTION

[0004] The present invention relates to calculators, and more particularly to calculators especially adapted to perform trading calculations for the securities industry. This calculator is “for traders of all levels . . . trading securities of all types”, who need to determine trade order size(s) by price, number of option(s)/or contract(s) by premium, and other individual variables for option trading, margin, and cash flow/or rate-of-return calculations.

[0005] Methods have been developed for electronic calculators to perform calculations on trading data. “The Monroe Trader” (1978; serial # K554351 made in the U.S.) calculates data for bonds, notes, and treasury bills. Many other types of electronic calculators have been developed that allow direct input of fractional data (pre-defined and manual input of fractions). Please see “References” in this document. Patents that relate to “pre-defined fractional input” have now expired (see Goldsamt, et al. and Hughins); patents that relate to “manual fraction input” are very close to their expiration date (see Stover, et al.): 4081859 March, 1978 Goldsamt, et al. 364/709 4545022 October 1985 Hughins 364/709 4744044 May 1988 Stover, et al. 364/737

[0006] This patent for Trading Calculator takes advantage of “pre-defined fractional input”, in order to calculate trade order size(s) by price and number of option(s)/or contract(s) by premium, allowing the user to quickly scroll through a range of records in either decimal or fractional formats. We have not found any prior art for hand-held electronic trading calculators that allows the user to quickly scroll through order size(s) by price, or scroll through number of option(s)/or contract(s) by premium in either a decimal or fractional format. In addition, we have not found any prior patents for hand-held electronic trading calculators that determine unknown/or not stored variables for an option(s) trade, or a variety of margin, cash flow/or rate-of-return calculations.

BRIEF SUMMARY OF THE INVENTION

[0007] There are no previous problems that need to be overcome in the present invention. Essentially, a hand-held electronic calculator is provided enabling traders worldwide to be fast, proactive, prepared, and informed by quickly performing active and non-active trading functions; some of these functions include calculating trade order size(s), number of option(s)/or contract(s), and calculating the unknown/or not stored variable for an option(s) trade or a variety of margin, cash flow, and rate-of-return calculations.

[0008] More particularly, in the first aspect, the calculator includes means for storing numeric trading price(s)/or premium(s) and range(s), and the cash, margin, option, and total buying power dollar amounts. This numeric input is used as a means for calculating trade order size(s) and number of option(s)/or contract(s) by price/or premium. The trader selects a pre-defined fraction from a selector switch or button, in addition to a mode type of decimal or fraction. The trader then simply inputs the cash, margin, option money, buying power, and price/or premium into the calculator and it responds by assigning each price/or premium an order size/or number of option(s)/or contract(s) determined by internal calculations. The user/or trader, can then quickly scroll/view order size(s) and number of option(s)/or contract(s) by price or premium using speed keys and up/down arrow keys throughout a price/or premium range. Speed keys or up/down arrow keys can be used to quickly change price increments, instead of re-keying trading data over and over again.

[0009] In a preferred embodiment of the first aspect, the calculator includes means enabling the trader to manually override/or clear the numeric trading price/or premium. This enables the calculator to accommodate different trading price/or premium ranges without changing preset keys for total cash, margin, option money, or buying power dollar amounts.

[0010] In a second aspect, the calculator automatically determines unknown/or not stored variables for an option(s) trade and for a variety of margin, cash flow, and rate-of-return calculations. For these types of trading functions, the trader inputs option, margin, cash flow, and rate-of-return variables, and the calculator responds by returning the unknown/or not stored variable. The calculator determines and displays the variable corresponding to the trading mode/function performed. The Trading Calculator also performs standard calculator functions.

[0011] These and other objects, advantages, and features of the invention will be more fully understood and appreciated by reference to the detailed description of the preferred embodiment and the drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

[0012] Note: The Trading Calculator will be manufactured in several different styles or models (pocket, hand-held, desktop). Two different drawings are being included in this patent, as the claim(s) apply to both and have been written accordingly:

[0013] 1. Advanced Model (hand-held or desktop styles only). This model incorporates Standard Calculator Mode, Trade Order Size Mode, Option Mode, and Margin/Cash Flow/Rate-of-Return Mode.

[0014] 2. Basic/or “Core Concept” Model (pocket, hand-held, or desktop styles). Includes Standard Calculator Mode and Trade Order Size Mode (that includes premium and contracts).

[0015] TRADING CALCULATOR—ADVANCED MODEL (hand-held, or desktop styles)

[0016]FIG. 1A is a front view of the calculator of the present invention showing trade price and calculated order size;

[0017]FIG. 1B is a front view of the calculator of the present invention showing premium and calculated number of contracts;

[0018]FIG. 1C is a flow chart illustrating the program flow of the “main” routine of the calculator;

[0019]FIG. 1D is a flow chart illustrating the program flow of the “order size” subroutine of the calculator;

[0020]FIG. 1E is a flow chart illustrating the program flow of the “option” subroutine;

[0021]FIG. 1F is a flow chart illustrating the program flow of the “margin/cash flow/rate-of-return” subroutine;

[0022]FIG. 1G is a front view of the display that shows sections and annunciators/indicators.

[0023] TRADING CALCULATOR—BASIC/CORE CONCEPT MODEL (pocket, hand-held, or small desktop styles)

[0024]FIG. 2A is a front view of the calculator of the present invention showing trade price and calculated trade order size;

[0025]FIG. 2B is a front view of the calculator of the present invention showing premium and calculated number of contracts.

[0026] [*note: this model contains the “main” routine and “order size” subroutine as shown above.]

DETAILED DESCRIPTION OF THE INVENTION

[0027] A calculator constructed in accordance with a preferred aspect of the invention is illustrated in FIG. 1A and generally designated 10. The calculator includes a body or housing 12 supporting a keypad 13 and a display 14. The display includes a number section 16, a trading price/premium section 18, an order size/or number of contract(s) section 22, a mode type (order size, rate of return, option variables) section 20, cash type section 11 (cash $, margin $, total buying power $), and a key indicator (section 21), when operating trade order size, options, and rate of return modes. The display also includes a plurality of annunciator/indicators. The calculator 10 is illustrated in FIG. 1A in a configuration that is conventional in the art. Specifically, the keypad 13 and the display 14 are both connected to a processor 15. A storage device 17 is also connected to the processor 15. The processing functions described in this application are carried out by the processor 15; and storage functions are accommodated in storage device 17. When operating in the calculator mode, display 14 displays numbers in conventional fashion.

[0028] The keys supported within the body of the calculator are as follows: TABLE 1 Designating Key Numeral ON/C 1 SET 2 OFF 3 M− set 5  M+ 5 CLEAR RANGE (C/RNG) 6 RECALL (RCL) 7 CLEAR MEMORY (CLR/M) set 7  IN-THE-MONEY (IN$) set 12 SETTLEMENT VALUE-AUTO (SVA) 9 SETTLEMENT VALUE-NON AUTO (SVNA) set 9  MULTIPLIER (MULTP) or (MULTIPLIER) 12 RETURN % (ROR) 13 YIELD % (YIELD) 16 INTERNAL RATE OF RETURN % (IRR) set 13 OPTION$ (OPT$) 4 PURCHASE PRICE (P/PRICE) set 10 CURRENT PRICE (C/PRICE) 10 NUMBER OF OPTIONS (# OPTS) 8 GAIN/LOSS (G/L) set 16 PREMIUM PER SHARE (PREM/SH) set 4  FEES (FEES) set 21 CAP INTERVAL (CAP INT) set 8  TOTAL DIVIDENDS (DVD$) 20 TOTAL DIVIDEND RE-INVESTMENT % set 14 (REINV) TOTAL DIVIDEND INCOME (DVD INC) 14 NUMBER OF MONTHS (TERM) 21 CAP AMOUNT (CAP$) set 27 STRIKE PRICE (STRIKE) set 23 EXERCISE PRICE (EX$) 23 AVG QUARTERLY DIVIDEND (QDVD) set 20 TOTAL TAX % (TAX) 25 STATE & FEDERAL TAX % (ST/FD TX) set 25 NUMBER OF SHARES (#SHRS) 27 INDIVIDUAL NUMBERS 29 TOTAL CASH (CASH) 30 TOTAL MARGIN (MARGIN) 45 TOTAL BUYING POWER (BUYING POWER) 31 TOTAL OPTION MONEY (OPT$) 32 TO (TO) 33 DEDICATED EXECUTION KEY (TRADE) 34 SCROLL UP 35 SCROLL DOWN 36 FRACTION INDICATOR/SELECTOR 37 (0, 1/32^(nd), 1/16^(th), 1/8^(th), 1/4^(th), 1/2) DECIMAL-FRACTION MODE SWITCH 46 % 38 × 39 + 40 DIVIDE (/) 41 − 42 = 43 +.01 Increment Speed Key 44 −.01 Increment Speed Key 47 +.05 Increment Speed Key 48 −.05 Increment Speed Key 49

[0029] The function of these keys is explained in conjunction with the flow charts and front-views shown in the drawings.

[0030] The calculator has been designed so that a trading price/or premium or trading price/or premium range can be entered and determined using several different methods:

[0031] 1. Manually by the user (using dedicated or non-dedicated switches or keys)

[0032] 2. determined internally by processor means with input from user

[0033] 3. by using price/premium increment(s) using special “speed key(s)” or “up/down arrow keys” where an increment is added to the current price/or premium to arrive at a new price/or premium

[0034] 4. or any combination of these method #'s 1-3.

[0035] For method #1 or #2 above, the calculator may include a table of whole numbers from 1 through 1000 (WN-LU). When the user enters an individual trading price/or trading price range (current price or premium) by way of HIGH-PRICE and LOW-PRICE internal variables, the calculator will use table WN-LU to determine the whole numbers between LOW-PRICE and HIGH-PRICE in order to create table LU1(LOW-PRICE and HIGH-PRICE numbers are included in table LU1 in addition to the whole numbers between LOW-PRICE and HIGH-PRICE). It should also be noted that prices and price ranges can also be determined internally by processor means with the entry of just one of these LOW-PRICE or HIGH-PRICE variables. Manually entering a user-defined range is an option, and certainly not a required method. These whole numbers/or prices will then be used in table LU1 to determine fractional price/or premiums within a price/or premium range. For example, a portion of table WN-LU is shown: TABLE WN-LU Whole Number Table (1-1000)  1  2  3  4  5  6  7  8  9 10 11 12 13 . . . up to 1000

[0036] Trading price table (LU1) may store the trading price/or premium derived from table WN-LU, Fraction Indicator/Selector (key 37), manual input, and internal processor means. Table LU1 may also store the price/or premium range of numbers that was determined manually, or internally by the calculator's processor means. Table LU1 accommodates the fractional increment selected by the user (key 37) and with processor means or manual input, determines prices/and premiums within a a price/or premium range.

[0037] Each price/or premium included in the range determined in Table LU1 is then divided by the stored amount for total cash, margin, option, or buying power (keys 30,31,32,45) depending on which one is selected by the user. This division creates an associated trade order size table (LU2) that is displayed (display 14), and can be viewed by the user by scrolling up (key 35) or scrolling down (key 36), or using Increment Speed Keys (keys 44,47,48,49).

[0038] The Fractional Indicator/Selector (key 37) can select a variety of fractions, the most common will be increments of {fraction (1/32)}^(nd)'s, {fraction (1/16)}^(th)'s, ⅛^(th)'s, ¼^(th)'s, ½'s, and; decimal equivalents of fractions can also be displayed as an option, instead of displaying fractions, i.e. 1.250 instead of 1¼^(th).

[0039] The Decimal-Fraction Mode Switch (switch/key 46) determines the mode of the calculator, and whether or not decimals or fractions will be displayed. If switch/key 46 is set to fraction, the calculator uses input from the fractional indicator/selector (key 37) to determine the price/or price range, and the user can then view/scroll through records using up/down arrow keys (keys 35 or 36). If switch/key 46 is set to decimal, the calculate uses manual input from the user to determine an internal price range where the user can then view/scroll through records by decimal increment(s) using Speed Keys (keys 44,47,48,49); it should be noted that instead of processor means determining an internal price range, price increments can be used as a method to quickly determine prices/or premiums with associated order size, number of options/or contracts. TABLE LU1 (EXAMPLE; 30-32 by 1/4) Whole Number Price/or Premium 30 30¼ 30½ 30¾ 31 31 31¼ 31½ 31¾ 32 32

[0040] Continuing on with this example, if the total buying power (TBP$ key 31) was set and stored as $76,840.00, then each fractional number of table LU1 would be divided into $76,840.00, thereby calculating (EQU1) an associated trade order size that can be purchased (always rounded down to the nearest whole number for each trading price). Table LU2 would then become: TABLE LU2 (EXAMPLE; 30-32 by 1/4) Price/or Premium Trade Order Size 30¼ 2540 30½ 2519 30¾ 2498 31 2478 31¼ 2458 31½ 2439 31¾ 2420 32 2401

[0041] The first entry in table LU2 will be displayed by the calculator (only fractional price and trade order size. Fractional premium and number of option(s)/or contract(s) would be the only two variables displayed when calculating the number of option(s) or contract(s). To view/scroll through the table, the user would use keys 35 and 36. To adjust table LU1 and LU2 respectively, the user can clear the trading price range by depressing ON/C (key 1) or C/RNG (key 6), and then re-key a new individual trading price or price range by using the TO (key 33), individual numbers (keys 29), and TRADE (key 34). An individual price can be entered instead of a price range by using keys 29 and depressing TRADE (key 34). In addition, as already mentioned above, entering a price range manually (with a separator) is not required; the processor means can determine a price range internally when the user enters a single price, or increments can be used. These order sizes and fractional numbers are permanently embodied in read-only memory (ROM), and the user cannot edit them. The user can edit/or change them by entering a new price/or price range as mentioned above using the nonvolatile area of random-access memory (RAM). Default values for tables LU1 and LU2 are zero.

[0042] If an individual trading price was entered by the user, tables LU1 and LU2 would only have one record each.

[0043] Another example like the creation of table LU2, is when a user wants to calculate the number of option(s) or contract(s) he/she can purchase. If the trading premium range of 30-40 was selected as shown in the above example, and the total money (keys 30,31,32,45) was set and stored as above ($76,840), and an option multiplier of 100 was set and stored (key 12) then tables WN-LU and LU1 would be created exactly as shown above. Table LU2, although, would have an additional column of data that would store the number of contract(s) [rounding down as stated above]. This is shown below in Table LU3. The number of contract(s) is calculated (EQU2) by dividing the trade order size (in LU2) by the stored option multiplier (key 12): TABLE LU3 (EXMAPLE; 30-32 by 1/4) Number of Premium Trade Order Size Contracts 30¼ 2540 25 30½ 2519 25 30¾ 2498 24 31 2478 24 31¼ 2458 24 31½ 2439 24 31¾ 2420 24 32 2401 24

[0044] The user can then view/scroll through each record that displays premium and number of contract(s) by using up/down arrow keys (keys 35, 36) or speed keys (keys 44,47,48,49) in combination with selector keys 37 and 46.

[0045] Again, for method #3 aforementioned, instead of using a price/or premium range (manually or internally set by processor means), prices/or premiums can be changed using incremental speed keys (keys 44,47,48,49) where increments are added to prices/or premiums to arrive at a new price/or premium. For example, with the Decimal-Fraction Mode Switch (key 46) set to “Decimal” and the amount of money being traded previously entered (keys 30,31,32,35), the user could then enter 25.23 using the keypad (keys 29) followed by depression of the TRADE key 34.

[0046] At this point the first display signal would be shown, and the display indicators would correlate to either premiums/contracts or price/order size depending on whether or not the multiplier (key 12) was depressed or not with a previously stored entry; when key 12 is depressed, the calculator determines the number of contracts instead of the order size as shown in Table LU3. In this example, let's assume that key 12 was not depressed and there was nothing stored in key 12. Internal calculations would be like those shown in Table LU2 using $76,840 as the stored amount of cash (key 30). $76,840 (stored key 30) divided by a price of 25.23 equals 3045.58, rounded down to 3045.

DISPLAY EXAMPLE Order Size

[0047] 25.23 3045 Price Cash Order Size

[0048] At this point, the user could then depress a +0.01 increment (key 44). A second display signal would then be shown where 0.01 is added to 25.23 arriving at a new price/or premium 25.24. Again, $76,840 (stored key 30) now divided by 25.24 to equal 3044.37, rounded down to 3044.

DISPLAY EXAMPLE Order Size

[0049] 25.24 3044 Price Cash Order Size

[0050] Continuing on with this example, the user could now depress a +0.05 increment (key 48). Another display signal would then be shown where 0.05 is added to the last price shown, 25.24, thus arriving at a new price 25.29. Again, $76,840 (stored key 30) now divided by 25.29 to equal 3038.35, rounded down to 3038.

DISPLAY EXAMPLE Order Size

[0051] 25.29 3038 Price Cash Order Size

[0052] The number of contracts can be determined by increments in the same manner when multiplier (key 12) is depressed, and has a stored entry. Display indicators correlate to price/order size or premium/contracts accordingly.

[0053] These last several examples had the Decimal-Fraction Mode Switch (key 46) set to “Decimal”. When the Decimal-Fraction Mode Switch (key 46) is set to “Fraction” and the amount of money being traded was previously entered (keys 30,31,32,35), the user could then select a pre-defined fractional increment from Fraction Indicator/Selector (key 37), and then enter a number using the keypad (keys 29) followed by depression of the TRADE (key 34). At this point the first display signal would be shown, and the display indicators would correlate to either premiums/contracts or price/order size depending on whether or not the multiplier (key 12) was depressed or not with a previously stored entry; when key 12 is depressed, the calculator determines the number of contracts instead of the order size as shown in Table LU3. In this example, let's assume that key 12 was not depressed and there was nothing stored in key 12, that the Fraction Indicator/Selector (key 37) was set to ¼^(th), the Cash (key 30) had $76,840 previously entered and was depressed, and the Decimal-Fraction Mode Switch (key 46) was set to “Fraction”. At this point, the user enters the number 30 on the keypad (keys 29) and then depresses the TRADE (key 34). Internal calculations would be those shown in Table LU2 using $76,840 as the stored amount of cash (key 30). The first display signal would be:

DISPLAY EXAMPLE Order Size

[0054] 30 ¼ 2540 Price Cash Order Size

[0055] At this point, the user could then depress the up/or down arrow scroll (keys 35,36) to view/scroll through records by the pre-defined fractional increment already selected by Fraction Indicator/Selector (key 37). At this point, if the user depressed the up arrow (key 35) key once, a second display signal would then be shown as in Table LU2:

DISPLAY EXAMPLE Order Size

[0056] 30 ½ 2519 Price Cash Order Size

[0057] The user can continue on, viewing/scrolling up or down in the price/or premium range using this methodology, or clear the range and select a new price or price range. The price range can be determined using a variety of methods, and is not limited.

[0058] I. Main Routine

[0059] Program flow of the main routine <100> is illustrated in FIG. 1C. The calculator is powered on by depressing ON/C key 1. Tables WN-LU,LU1,LU2,LU3 are reset <101> to the default values of 0. A hard reset is only performed when the batteries are removed. At this point, any keys can be depressed <102>. The calculator determines <103> if standard calculator functions will be performed. If they are, standard keys are depressed <104>, calculated <105>, and displayed <106>. If standard calculator functions are not to be performed <103>, the mode then needs to be determined <108>. The default mode <104> is calculator mode 500. Depressing TBP$ key 31, CASH$ key 30, or OPTION$ key 32, or MARGIN$ key 45 places the calculator in trading order size mode 200. Depressing keys 4,8,9,12,23 and set keys 4,8,9,12,23,27 places the calculator in options trade mode 300, and depressing keys 10,13,14,16,21,25 and set keys 10, 13, 14, 16, 20, 21, 25 places the calculator in rate of return mode 400. At any time during the operation of the calculator, any of the above keys can be depressed whereupon the calculator enters the corresponding mode 200,300,400, or 500. The mode is then displayed <107,109,113> on display 14 (section 20). The main routine 100 will process trade order sizes <111> including number of option(s) or contract(s), option trading variables <110>, margin/percentage/cash flow/rate of return variables <112>, and standard calculator functions <104>. The calculator is powered off <114> by depressing the OFF key 3. In order to facilitate a precise description of the operation of the calculator, the following internal variables will be used: INTERNAL VARIABLES 1-1 Variable Description High-Price High trading price of range, user-defined Low-price Low trading price of range, user-defined FRA CP Fractional trading price (internal table LU1) FRA CIND Fractional indicator/setting (stored key 37) ORDSZ Trade order size (internal table LU2) MULTP Option multiplier (stored key 12) WN Whole number (internal table WN-LU) NOOPS Number of contracts (internal table LU2) CASH$ Total cash money (stored key 30) MARGIN$ Total margin money (stored key 45) TBP$ Total buying power money (stored key 31) OPT$ Total option money (stored key 32) OPT1 Premium per share (stored key set 4) OPT2 Total option money (stored key 4) OPT3 in money (stored key set 12) OPT5 cap interval (stored key set 8) OPT6 # of options (stored key 8) OPT7 cap price (stored key set 27, EQU27) OPT8 # of shares (stored key 27) OPT9 strike price (stored key set 23) OPT10 exercise price (stored key 23, EQU8, 10) OPT11 settlement value (stored key 9, EQU34) OPT13 settlement value (stored key set 9, EQU33) OPT12 multiplier (stored key 12) OPT14 option money (stored key 4, EQU4) ROR1 fees total (stored key set 21) ROR2 term/months (stored key 21) ROR3 yield % (stored key 16, EQU79-80) ROR4 annualized return % (stored key 13, EQU51-62) ROR5 avg qtrly dividend (stored key set 20) ROR6 total dividends (stored key 20, EQU15-16) ROR26 total dividend income (stored key 14) ROR17 total dividend re-investment % (stored key set 14) ROR7 current price (stored key 10, EQU63-74) ROR8 purchase price (stored key set 10) ROR10 IRR % (stored key set 13, EQU#-#) ROR11 gain/loss total (stored set key 16, EQU75-78) ROR12 EQU23 result (stored internally, fees/share) ROR13 EQU24 result (stored internally, g/l per share) ROR14 EQU25 result (stored internally, total divd/share) ROR15 EQU26 result (stored internally, tax calc) ROR18 EQU36 result (stored internally, divd/share/year) ROR16 EQU35 result (stored internally, net cash flow) ROR20 ending balance (stored internally, EQU37) ROR21 beginning balance (stored internally, EQU38) ROR19 dividend reinvested income (stored key 14, EQU83-84) ROR9 total tax % (stored key 25) ROR22 ROR % conversion (stored internally, EQU5) ROR23 REINV % conversion (stored internally, EQU7) ROR24 IRR % conversion (stored internally, EQU9) ROR25 total state/federal tax (stored key set 25) ROR27 YIELD % conversion (stored internal, EQU11)

[0060] II. Trading Order Size Mode

[0061] The main routine <100> transfers control <201> (FIG. 1D) to the trading order size subroutine <200> when TBP$ key 31, CASH$ key 30, OPTION$ key, or MARGIN$ key 45 <201> is depressed. This subroutine processes the amount stored in the key register (key 30,31,32,45). If the key register does not contain a number <202>, the control is immediately returned to the main routine <100>. If the key register does contain an amount in register 30,31,32,45, the calculator then checks <203> for a multiplier stored in key register 12. If a multiplier is not stored in key register 12, the calculator then waits <209> for a trading price to be entered using keys 29. Once a trade price is entered, the TRADE key 34 is then depressed <210> which activates the processor means to determine a trading price range, and then determine <211> order sizes for each price in the price range and display <212> order size by price (from table LU2) on display 14 that the user can view or scroll through <213> using up/down arrow keys 35 and 36, or increment speed keys 44,47-49. If a multiplier is stored <203> in key register 12, the calculator then waits <204> for a trading premium to be entered using keys 29. Once a trading premium is entered, the TRADE key 34 is then depressed <205> which activates the processor means to determine a trading premium range, and then determine <206> the number of contract(s) for each premium in the premium range and display <207> the number of contract(s) by premium (from table LU2) on display 14 that the user can view or scroll through <208> using up/down arrow keys 35 and 36, or increment speed keys 44,47-49. Control is then given back to the calling routine <214>. Please refer to tables WN-LU, LU1, LU2, and LU3 for examples. All data in tables WN-LU, LU1, LU2, and LU3 are retained until the OFF (key 3), ON/C (key 1), or C/RNG (key 6) is depressed. [Please refer to examples and Equations Table 1-1 for internal calculations in regard to determining order size(s) and the number of contract(s).]

[0062] III. Options Trading Mode

[0063] The main routine <100> transfers control <301> (FIG. 1E) to the options trading subroutine <300> when keys 4,8,9,12,23 and set keys 4, 8, 9, 12, 23, 27 are depressed. The user can then enter option variables through keys 29. These option variables are stored <303> in option key registers and displayed <304>. When the user finishes entering option variables into the different key registers, the user decides if input is complete <305>. If not, the user can continue <302> to enter option variables through keys 29. If the user decides that input is complete <305>, he/she can then depress the desired unknown/or not stored option variable key <306>, where the calculator then determines <307> that unknown variable. If the calculator cannot determine the unknown variable because necessary variables were not previously entered <312>, the user can then enter those missing variables <302>, and then once again depress <306> the desired unknown/or not stored option variable key. If the calculation is successful, the resultant variable will be stored <308> and displayed <309>; a “RUN” indicator is shown in the display when the calculation is taking place, indicating that the process is “running”. At this point, the user has the choice to solve for additional unknown option variables <310>, or return the control to the calling routine <311>. Keys 4,8,9,12,23,27 and set keys 4,8,9,12,23 are used during this process, and internal variables are also assigned (see Internal Variables 1-1). Also refer to Equations Table 1-1, where any variable—for any equation—can be solved for. Stored entries can be re-displayed <304> at any time by depressing the option key directly <306>.

[0064] IV. Rate of Return Mode

[0065] The main routine <100> transfers control <401> (FIG. 1F) to the rate-of-return trading subroutine <400> when keys 10,13,14,16,20,21,25 and set keys 10,13,14,16,20,21,25 are depressed. The user can then enter margin/percentage/cash flow/rate-of-return variables through keys 29. These rate-of-return variables are stored <403> in key registers and displayed <404>. When the user finishes entering rate-of-return variables into the different key registers, the user decides if input is complete <405>. If not, the user can continue <402> to enter rate-of-return variables through keys 29. If the user decides that input is complete <405>, he/she can then depress the desired unknown/or not stored margin/percentage/cash flow/rate-of-return variable key <406>, where the calculator then determines <407> that unknown variable. If the calculator cannot determine the unknown variable because necessary variables were not previously entered <412>, the user can then enter those missing variables <402>, and then once again depress <406> the desired unknown/or not stored variable key. If the calculation is successful, the resultant variable will be stored <408> and displayed <409>; a “RUN” indicator is shown in the display when the calculation is taking place, indicating that the process is “running”. At this point, the user has the choice to solve for additional unknown rate-of-return variables <410>, or return the control to the calling routine <411>. Keys 10,13,14,16,20,21,25 and set keys 10,13,14,16,20,21,25 are used during this process, and internal variables are also assigned (see Internal Variables 1-1). Also refer to Equations Table 1-1, where any variable—for any equation—can be solved for. Stored entries can be re-displayed <404> at any time by depressing the rate-of-return key directly <406>.

[0066] V. Output

[0067] The calculator will display trading order size(s) by price and number of contract(s) by premium. It will also display individual option trading variables and margin/percentage/cash flow/rate-of-return variables.

[0068] VI. Operation

[0069] The present calculator quickly and easily processes trade order size(s) by price and number of contract(s) by premium; users can view/scroll through records in a price/or premium range using up/down arrow keys or incremental speed keys. It also processes option trading and margin/percentage/cash flow/rate-of-return variables. The calculator is powered on by depressing the ON/C key 1. Tables WN-LU, LU1,LU2, and LU3 are reset to default automatically, and counters are cleared.

[0070] Examples of using the invention are below. Examples that demonstrated use of the trading order size mode were already shown above when discussing internal tables WN-LU,LU1,LU2,LU3. A few more examples will demonstrate the use of the calculator in options trading mode and rate of return mode, when determining individual variables. An equations table is listed for reference: EQUATIONS TABLE 1-1 Internal EQU# Variable EQUATION EQU1 FRACP = WN + FRACIND EQU2 ORDSZ = FRACP/(CASH$/or TBP$/or OPT$/or MARGIN$) EQU3 NOOPS = ORDSZ/MULTP EQU4 OPT14 = (OPT1) (OPT6) (OPT12) EQU6 OPT1 = OPT$/(OPT6) (OPT12) EQU8 OPT10 = OPT1 + OPT9 EQU10 OPT10 = {[(OPT6) (OPT12) (OPT1) + (OPT3)]/[(OPT6) (OPT12)]} + OPT9 EQU23 ROR12 = ROR1/OPT8 EQU24 ROR13 = (ROR7 − ROR8) (ROR9) EQU25 ROR14 = (ROR6/OPT8) (ROR9) EQU26 ROR15 = 100 − ROR9/100 EQU27 OPT7 = OPT9 + OPT5 EQU28 OPT8 = OPT$/OPT1 EQU29 OPT8 = OPT6 × OPT12 EQU33 OPT13 = (OPT12) (OPT10 − OPT9) EQU34 OPT11 = OPT5 × OPT12 EQU36 ROR18 = (ROR5/OPT8) (4) EQU37 ROR20 = ROR7 × OPT8 EQU38 ROR21 = ROR8 × OPT8 EQU51 ROR4 = {[(ROR20 − ROR21 + ROR6 + ROR19 − ROR1/ROR21) × 100]/60} × 12 EQU52 ROR4 = {[(ROR20 − ROR21 + ROR6/ROR21) × 100]/60} × 12 × ROR15 EQU53 ROR4 = {[(ROR20 − ROR21 − ROR1/ROR21) × 100]/60} × 12 × ROR15 EQU54 ROR4 = {[(ROR20 − ROR21/ROR21) × 100]/60} × 12 × ROR15 EQU55 ROR4 = {[(ROR20 − ROR21 − ROR1/ROR21) × 100]/60} × 12 EQU56 ROR4 = {[(ROR20 − ROR21/ROR21) × 100]/60} × 12 EQU57 ROR4 = {[(ROR20 − ROR21 + ROR6 + ROR19/ROR21) × 100]/60} × 12 EQU58 ROR4 = {[(ROR20 − ROR21 + ROR6 + ROR19/ROR21) × 100]/60} × 12 × ROR15 EQU59 ROR4 = {[(ROR20 − ROR21 − ROR1 + ROR6 + ROR19/ROR21) × 100]/60} × 12 × ROR15 EQU60 ROR4 = {[(ROR20 − ROR21 + ROR6/ROR21) × 100]/60} × 12 EQU61 ROR4 = {[(ROR20 − ROR21 − ROR1 + ROR6/ROR21) × 100]/60} × 12 EQU62 ROR4 = {[(ROR20 − ROR21 − ROR1 + ROR6/ROR21) × 100]/60 } × 12 × ROR15 EQU5 ROR22 = ROR4/100 EQU7 ROR23 = ROR17/100 EQU9 ROR24 = ROR10/100 EQU11 ROR27 = ROR3/100 EQU63 ROR7 = [(ROR21) (ROR4) + (20) ROR21 − (20) ROR6 − (20) ROR19 + (20) ROR1]/(20) OPT8 EQU64 ROR7 = [(ROR21) (ROR4) + (20) (ROR21) (ROR15) − (20) (ROR6) (ROR15)]/(20) OPT8 EQU65 ROR7 = [(ROR21) (ROR4) + (20) (ROR21) (ROR15) + (20) (ROR1) (ROR15)]/(20) OPT8 EQU66 ROR7 = [(ROR21) (ROR4) + (20) (ROR21) (ROR15)]/(20) OPT8 EQU67 ROR7 = [(ROR21) (ROR4) + (20) ROR21 + (20) ROR1]/(20) OPT8 EQU68 ROR7 = [(ROR21) (ROR4) + (20) (ROR21)]/(20) OPT8 EQU69 ROR7 = [(ROR21) (ROR4) + (20) ROR21 − (20) ROR6 − (20) ROR19]/(20) OPT8 EQU70 ROR7 = [(ROR21) (ROR4) + (20) (ROR21) (ROR15) − (20) (ROR6) (ROR15) − (20) (ROR19) (ROR15)]/(20) OPT8 EQU71 ROR7 = [(ROR21) (ROR4) + (20) (ROR21) (ROR15) − (20) (ROR6) (ROR15) − (20) (ROR19) (ROR15) + (20) ROR1) (ROR15)]/(20) OPT8 EQU72 ROR7 = [(ROR21) (ROR4) + (20) ROR21 − (20) ROR6]/(20) OPT8 EQU73 ROR7 = [(ROR21) (ROR4) + (20) ROR21 − (20) ROR6 + (20) ROR1]/(20) OPT8 EQU74 ROR7 = [(ROR21) (ROR4) + (20) (ROR21) (ROR15) − (20) (ROR6) (ROR15) + (20) (ROR1) (ROR15)]/(20) OPT8 EQU75 ROR11 = [(ROR7 − ROR8) (OPT8) − ROR1] × [ROR15] EQU76 ROR11 = [(ROR7 − ROR8) (OPT8)] × [ROR15] EQU77 ROR11 = [(ROR7 − ROR8) (OPT8) − ROR1] EQU78 ROR11 = [(ROR7 − ROR8) (OPT8)] EQU79 ROR3 = [(ROR5/OPT8) (4)] × (ROR15)/ROR7 EQU80 ROR3 = [(ROR5/OPT8) (4)]/ROR7 EQU81 ROR6 = (ROR5/3) (ROR2) (ROR15) EQU82 ROR6 = (ROR5/3) (ROR2) EQU83 ROR19 = (ROR6 × ROR23) (ROR15) EQU84 ROR19 = (ROR6 × ROR23) EQU#-# ROR10 = IRR % equations still being developed, and will be added when completed.

[0071] RATE OF RETURN MODE CALCULATIONS (TABLE 3-1) Program Flow ROR15 ROR1 ROR19 ROR6 EQU51, 63 =0 >0 >0 >0 EQU52, 64 >0 =0 =0 >0 EQU53, 65 >0 >0 =0 =0 EQU54, 66 >0 =0 =0 =0 EQU55, 67 =0 >0 =0 =0 EQU56, 68 =0 =0 =0 =0 EQU57, 69 =0 =0 >0 >0 EQU58, 70 >0 =0 >0 >0 EQU59, 71 >0 >0 >0 >0 EQU60, 72 =0 =0 =0 >0 EQU61, 73 =0 >0 =0 >0 EQU62, 74 >0 >0 =0 >0 EQU75 >0 >0 n/a n/a EQU76 >0 =0 n/a n/a EQU77 =0 >0 n/a n/a EQU78 =0 =0 n/a n/a EQU79 >0 n/a n/a n/a EQU80 =0 n/a n/a n/a EQU81 >0 n/a n/a n/a EQU82 =0 n/a n/a n/a EQU83 >0 n/a n/a n/a EQU84 =0 n/a n/a n/a

[0072] Options Trade Mode

EXAMPLES Example 1

[0073] If I want to buy 35 options at $10.00 premium, how much option money do I need? (multiplier of 100 assumed to be stored in key 12). EQU4 OPT14 = (OPT1) (OPT6) (OPT12) EQU4 OPT14 = ($10) (35) (100) = $35,000

[0074] In this example, all known data would be entered by the user, stored in the associated key register, and assigned an internal variable. The user would then depress the option money key 4. At this point, the calculator would display “RUN” in display 14 (section 18), then calculate EQU4 and store the resultant variable assigned OPT14 to key register 13, and also display this variable in display 14 (section 16). The option variable mode would be displayed in display 14 (section 20) along with the specific key indicator (section 21). Please refer to Options Trading Mode (Section III)(FIG. 1E) for more details on program flow. All other option variable mode examples below will follow this same logic.

Example 2

[0075] If I have $30,000 in total option money, and want to buy 20 options, what does the premium need to be? (multiplier of 100 assumed to be stored in key 12). EQU6 OPT1 = OPT$/(OPT6) (OPT12) EQU6 OPT1 = $30,000/(20) (100) = $15 premium per share.

Example 3

[0076] What exercise price/or cap price do I need to reach to have “even” option money for puts and calls. My original premium was $5.00 and strike price $50.00. EQU8 OPT10 = OPT1 + OPT9 EQU8 OPT10 = $5.00 + $50.00 = $55.00

Example 4

[0077] If I want to be “in-the-money” by $15,000, what exercise price/or cap price do I need to reach? I have 12 options at a $7.00 premium and a $40.00 strike price (multiplier of 100 assumed to be stored in key 12).

OPT10={[(OPT6)(OPT12)(OPT1)+(OPT3)]/[(OPT6)(OPT12)]}+OPT9  EQU10

OPT10={[(12)(100)($7.00)+($15,000)]/[(12)(100)]}+$40=$59.50  EQU10

Example 5

[0078] What will my settlement value be for an automatically exercised option with a cap interval of 23? (multiplier of 100 assumed to be stored in key 12). EQU34 OPT11 = OPT5 × OPT12 EQU34 OPT11 = 23 × 100 = $2300

Example 6

[0079] What will my settlement value be for an option that is not automatically exercised? The exercise settlement value today is $55.30 and my strike price was $41.75. EQU33 OPT13 = (OPT12) (OPT10 − OPT9) EQU33 OPT13 = (100) ($55.30 − $41.75) = $1355

[0080] Rate Of Return Mode

EXAMPLES Example 1

[0081] What is my FMRR rate of return (before taxes) if I sell now? My dividends are reinvested at 5%. (purchase price=$30.00/share, current price=$36.00/share, number of shares=200, avg. quarterly dividend=$100, term/months owned=60, total tax %=28%, total fees=$400).

[0082] In this example, all known data would be entered by the user, stored in the associated key register, and assigned an internal variable. The user would then depress the ROR % key 13. At this point, the calculator would display “RUN” in display 14 (section 18), then calculate the appropriate equation selected by program flow (FIG. 1F). In this example, at the time of depression of key 13, if ROR9=0, ROR1>0, ROR19>0, and ROR6>0, then equation EQU11 would be calculated by program flow (FIG. 1F) and resultant variable assigned ROR4 to key register 13. This variable would be displayed in display 14 (sections 16,17,20,21). Please refer to Rate of Return Mode Section IV for more details on program flow and key depression sequence. Other examples for FMRR rate of return follow this same logic, depending on whether ROR9, ROR1, ROR19, and ROR6 are > or =to zero (refer to FIG. 1F and EQU51-62). EQU51 ROR4 = {[(ROR20 − ROR21 + ROR6 + ROR19 − ROR1/ ROR21) × 100]/60} × 12 EQU51 ROR4 = {[($7200 − $6000 + $2000 + $100 − $400/$6000) × 100]/60} × 12 = 9.66% annualized rate of return EQU15 ROR6 = (ROR5/3) (ROR2) = (100/3) (60) = $2000 EQU37 ROR20 = ROR7 × OPT8 = $36 × 200 = $7200 EQU38 ROR21 = ROR8 × OPT8 = $30 × 200 = $6000 EQU35 ROR19 = ROR6 × ROR23 = $2000 × .05 = $100 EQU7 ROR23 = ROR17/100 = 5%/100 = .05

Example 2

[0083] What is my FMRR rate of return, without fees and after taxes, if I sell now? My dividends are not reinvested. (purchase price=$30.00/share, current price=$36.00/share, number of shares=200, avg. quarterly dividend=$100, term/months owned=60, total tax %=28%, total fees=$400).

[0084] Similar to Example 7 above, all known data would be entered by the user, stored in the associated key register, and assigned an internal variable. The user would then depress the ROR % key 13. At this point, the calculator would display “RUN” in display 14 (section 18), then calculate the appropriate equation selected by program flow (FIG. 1F). In this example, at the time of depression of key 13, if ROR9>0, ROR1=0, ROR19=0, and ROR6>0, then equation EQU12 would be calculated by program flow (FIG. 1F) and resultant variable assigned ROR4 to key register 13. This variable would be displayed in display 14 (sections 16,17,20,21). Please refer to Rate of Return Mode Section IV for more details on program flow and key depression sequence. Other examples for FMRR rate of return follow this same logic, depending on whether ROR9, ROR1, ROR19, and ROR6 are > or =to zero (refer to FIG. 1F and EQU51-62). EQU52 ROR4 = {[(ROR20 − ROR21 + ROR6/ROR21) × 100]/ 60} × 12 × ROR15 EQU52 ROR4 = {[($7200 − $6000 + $2000/$6000) × 100]/60} × 12 × .72 = 7.68% EQU26 ROR15 = (100 − ROR9)/100 = (100 − 28)/100 = .72 EQU15 ROR6 = (ROR5/3) (ROR2) = (100/3) (60) = $2000 EQU37 ROR20 = ROR7 × OPT8 = $36 × 200 = $7200 EQU38 ROR21 = ROR8 × OPT8 = $30 × 200 = $6000

Example 3

[0085] What selling price provides my desired FMRR rate of return of 15%?

[0086] My dividends are reinvested at 5%. (purchase price=$30.00/share, current price=$36.00/share, number of shares=200, avg. quarterly dividend=$100, term/months owned=60, total tax %=28%, total fees=$400).

[0087] In this example, all known data would be entered by the user, stored in the associated key register, and assigned an internal variable. The user would then depress the C/PRICE key 10. At this point, the calculator would display “RUN” in display 14 (section 18), then calculate the appropriate equation selected by program flow (FIG. 1F). In this example, at the time of depression of key 10, if ROR9=0, ROR1>0, ROR19>0, and ROR6>0, then equation EQU63 would be calculated by program flow (FIG. 1F) and resultant variable assigned ROR7 to key register 10. This variable would be displayed in display 14 (sections 16,17,20,21). Please refer to Rate of Return Mode Section IV for more details on program flow and key depression sequence. Other examples for FMRR rate of return follow this same logic, depending on whether ROR9, ROR1, ROR19, and ROR6 are > or =to zero (refer to FIG. 1F and EQU63-74). EQU63 ROR7 = [(ROR21) (ROR4) + (20) ROR21 − (20) ROR6 − (20) ROR19 + (20) ROR1]/(20) OPT8 EQU63 ROR7 = [($6000) (15) + (20) ($6000) − (20) ($2000) − (20) ($100) + (20) ($400)]/(20) (200) = $44.00 per share. EQU38 ROR21 = ROR8 × OPT8 = $30 × 200 = $6000 EQU15 ROR6 = (ROR5/3) (ROR2) = (100/3) (60) = $2000 EQU35 ROR19 = ROR6 × ROR23 = $2000 × .05 = $100 EQU7 ROR23 = ROR17/100 = 5%/100 = .05

Example 4

[0088] What is my total gain/or loss on sale, after taxes and with fees?

[0089] My dividends are reinvested at 5%. (purchase price=$30.00/share, current price=$36.00/share, number of shares=200, avg. quarterly dividend=$100, term/months owned=60, total tax %=28%, total fees=$400).

[0090] In this example, all known data would be entered by the user, stored in the associated key register, and assigned an internal variable. The user would then depress the G/L set key 16. At this point, the calculator would display “RUN” in display 14 (section 18), then calculate the appropriate equation selected by program flow (FIG. 1F). In this example, at the time of depression of set key 16, if ROR9>0, ROR1>0, then equation EQU75 would be calculated by program flow (FIG. 1F) and resultant variable assigned ROR11 to key register set 16. This variable would be displayed in display 14 (sections 16,17,20,21). Please refer to Rate of Return Mode Section IV for more details on program flow and key depression sequence. Other examples for total gain/loss follow this same logic, depending on whether ROR9 and ROR1 are > or =to zero (refer to FIG. 1F and EQU75-78). EQU75 ROR11 = [(ROR7 − ROR8) (OPT8) − ROR1] × [ROR15] EQU75 ROR11 = [($36 − $30) (200) − $400] × (.72) = $576.00 EQU26 ROR15 = (100 − ROR9)/100 = (100 − 28)/100 = .72

Example 5

[0091] What is my current yield on dividends after taxes?

[0092] My dividends are reinvested at 5%. (purchase price=$30.00/share, current price=$36.00/share, number of shares=200, avg. quarterly dividend=$100, term/months owned=60, total tax %=28%, total fees=$400).

[0093] In this example, all known data would be entered by the user, stored in the associated key register, and assigned an internal variable. The user would then depress the YLD % key 16. At this point, the calculator would display “RUN” in display 14 (section 18), then calculate the appropriate equation selected by program flow (FIG. 1F). In this example, at the time of depression of key 16, if ROR9>0, then equation EQU79 would be calculated by program flow (FIG. 1F) and resultant variable assigned ROR3 to key register 16. This variable would be displayed in display 14 (sections 16,17,20,21). Please refer to Rate of Return Mode Section IV for more details on program flow and key depression sequence. Other examples for yield % follow this same logic, depending on whether or not ROR9 is > or =to zero (refer to FIG. 1F and EQU79-80). EQU79 ROR3 = [(ROR5/OPT8) (4)] × (ROR15)/ROR7 EQU79 ROR3 = [(100/200) (4)] × (.72)/$36 = 4% EQU26 ROR15 = (100 − ROR9)/100 = (100 − 28)/100 = .72

Example 6

[0094] What are my total dividends received after taxes?

[0095] My dividends are reinvested at 5%. (purchase price=$30.00/share, current price=$36.00/share, number of shares=200, avg. quarterly dividend=$100, term/months owned=60, total tax %=28%, total fees=$400).

[0096] In this example, all known data would be entered by the user, stored in the associated key register, and assigned an internal variable. The user would then depress the DVD$ key 20. At this point, the calculator would display “RUN” in display 14 (section 18), then calculate the appropriate equation selected by program flow (FIG. 1F). In this example, at the time of depression of key 20, if ROR9>0, then equation EQU81 would be calculated by program flow (FIG. 1F) and resultant variable assigned ROR6 to key register 20. This variable would be displayed in display 14 (sections 16,17,20,21). Please refer, to Rate of Return Mode Section IV for more details on program flow and key depression sequence. Other examples for total dividends follow this same logic, depending on whether or not ROR9 is > or =to zero (refer to FIG. 1F and EQU81-82). EQU81 ROR6 = (ROR5/3) (ROR2) (ROR15) EQU81 ROR6 = ($100/3) (60) (.72) = $1440.00 EQU26 ROR15 = (100 − ROR9)/100 = (100 − 28)/100 = .72

Example 7

[0097] What is my total dividend reinvested income after taxes?

[0098] My dividends are reinvested at 5%. (purchase price=$30.00/share, current price=$36.00/share, number of shares=200, avg. quarterly dividend=$100, term/months owned=60, total tax %=28%, total fees=$400).

[0099] In this example, all known data would be entered by the user, stored in the associated key register, and assigned an internal variable. The user would then depress the DVD INC key 14. At this point, the calculator would display “RUN” in display 14 (section 18), then calculate the appropriate equation selected by program flow (FIG. 1F). In this example, at the time of depression of key 14, if ROR9>0, then equation EQU83 would be calculated by program flow (FIG. 1F) and resultant variable assigned ROR19 to key register 14. This variable would be displayed in display 14 (sections 16,17,20,21). Please refer to Rate of Return Mode Section IV for more details on program flow and key depression sequence. Other examples for total dividend reinvested income follow this same logic, depending on whether or not ROR9 is > or =to zero (refer to FIG. 1F and EQU83-84). EQU83 ROR19 = (ROR6 × ROR23) (ROR15) EQU83 ROR19 = ($2000 × .05) (.72) = $72.00 EQU82 ROR6 = (ROR5/3) (ROR2) = (100/3) (60) = $2000 EQU7 ROR23 = ROR17/100 = 5%/100 = .05 EQU26 ROR15 = (100 − ROR9)/100 = (100 − 28)/100 = .72

Example 8

[0100] What is my internal rate of return after taxes if I sell now?

[0101] My dividends are reinvested at 5%. (purchase price=$30.00/share, current price=$36.00/share, number of shares=200, avg. quarterly dividend=$100, term/months owned=60, total tax %=28%, total fees=$400).

[0102] In this example, all known data would be entered by the user, stored in the associated key register, and assigned an internal variable. The user would then depress the IRR % set key 13. At this point, the calculator would display “RUN” in display 14 (section 18), then calculate the appropriate equation selected by program flow. (FIG. 1F) The resultant variable assigned ROR10 would be stored in key register set 13. This variable would be displayed in display 14 (sections 16,17,20,21). Please refer to Rate of Return Mode Section IV for more details on program flow and key depression sequence. Other examples for internal rate of return follow this same logic (refer to FIG. 1F and EQU#-EQU#).

[0103] Note: *IRR % equations still being developed, and will be added on completion.

[0104] VII. Conclusion

[0105] The manner and process of making the invention will follow traditional handheld calculator manufacturing processes including overall circuit board design, layout, prototype, and construction. The best mode contemplated in order to carry out the invention will be to obtain patents, and then license these patents to leading specialty calculator manufacturers who are experts in bringing handheld calculators to market. The above description is that of a preferred embodiment of the invention. Various changes and alterations can be made without departing from the spirit and broader aspects of the invention as set forth in the appended claims, which are to be interpreted in accordance with the principles of patent law, including the doctrine of equivalents. 

We claim the invention of a hand-held electronic calculator for traders of all levels . . . trading securities of all types, the embodiments in which an exclusive property or privilege is claimed are defined as follows:
 1. An electronic calculator that determines trade order size(s) by price, using cash, margin, and buying power stored amount(s). Said device comprising: a case; computer means mounted within the case including a) memory means containing information relating to a trading price(s) where said processor means being responsive to said storage means to divide a trading price(s) into the previously entered cash, margin, or buying power total to calculate a resultant trade order size(s). b) input entry means including a keyboard for manually entering a trading price(s), and the amount of cash, margin, or buying power being traded. c) processing means responsive to a trading price entered through the keyboard using dedicated or non-dedicated key(s) to obtain a resultant trade order size(s), which is equal to the amount of cash, margin, or buying power previously entered through the keyboard divided by price(s) previously entered through the keyboard, and for generating a first display signal corresponding to the resultant order size(s) and price(s); and numeric means for manually inputting amount(s) for cash, margin, and buying power stored keys; numeric means for manually inputting trading price(s). input means to select decimal or fractional mode of operation; input means to modify/or clear the numeric trading price(s) including amount(s) for cash, margin, or buying power. input means for fractional and decimal price(s) that include “manual input” and “pre-defined input” methods using dedicated keys or non-dedicated digit entry key(s). input, processor, storage, and display means that accommodates decimals and fractions for determining price(s) and order size(s). processor means for calculating a trade order size(s) for the previously entered price(s), where said order size(s) and price(s) corresponds to the previously entered amount for cash, margin, and buying power. processor means for rounding down the resultant order size(s) to the next whole number and a display means for viewing this rounded number(s). processor means for determining an order size(s) for the price(s) previously entered through the keyboard, wherein said display means includes means for displaying the order size(s) and price(s) with descriptive acronyms. memory means for storing trading price(s), and a processor means being responsive to said storage means to divide trading price(s) into the previously entered amount of cash, margin, or buying power to calculate a resultant trade order size(s). display means for numbers indicative of the calculated order size(s) including trading price(s) and order size(s), enabling the trader to review same. display means for selectively displaying stored trading price(s) and calculated order size(s). look-up table means for storing trade price(s), so that trade price(s) can be divided into the amount of previously entered cash, margin, and buying power total, to determine trade order size(s). look-up table means for storing numeric value(s) that are responsive to the processor means to calculate trading price(s) and order size(s). said keyboard includes a dedicated or non-dedicated first command key operatively connected to the processing means for automatically initiating the operations of the processing means involving the price(s) previously entered and determining a trade order size(s) by dividing the amount of cash, margin, or buying power previously entered by price(s) previously entered, generating the first display signal upon entry of the price(s). processor means at least calculating EQU1 through EQU84, and also calculating each variable of each equation EQU1 through EQU84 that can be stored and displayed.
 2. An electronic calculator as defined in claim 1 wherein trade price(s) can be calculated between a maximum and minimum trading price with a resultant trading price range and means for calculating order size(s) for each trading price(s) within the price range. numeric means for manually inputting a trading price range or processor means internally determining a price range from the price previously entered by user; and means for manually inputting numbers to modify/or clear the numeric trading price range including amount(s) for cash, margin, or buying power. storage means wherein there exists a maximum number of records in an internal price range determined by the price previously entered through the keyboard; storage means for storing individual trading prices from the trading price range, said processor means being responsive to said storage means to divide each trading price of the price range into the previously entered amount of cash, margin, or buying power to calculate the resultant trade order size. processing, storage, and display means to accommodate fractional or decimal prices within the price range. processor means for calculating trade order size for each price in the price range, each of said order size and price corresponding to the inputted numeric amount for cash, margin, and buying power. processor means for rounding down the resultant order size to the next whole number, for each order size calculation within the price range, and a display means for viewing each rounded number. processor means for determining an order size for each price within the price range, wherein said display means includes means for displaying the order size and price with descriptive acronyms. processor means that determines an internal price range from the price previously entered, and an input and display means to view and scroll through price(s) and associated order size(s) in the price range. processor means that determines an internal price range from the previously entered high-price and low-price of the price range, and a display and input means to view and scroll through price(s) and associated order size(s) in the price range. numeric input means using dedicated or non-dedicated key(s) or switch(es), or a combination of dedicated and non-dedicated key(s) or switch(es), to enter a trading price range by entry of a single trading price, then depression of a dedicated or non-dedicated key that activates the processor means to determine an internal trading price range and resultant order size(s) for each price in the price range. numeric input means to enter a trading price range by entry of a low-price followed by the depression of a dedicated or non-dedicated key that stores this entry, then entry of a high-price followed by the depression of a dedicated or non-dedicated key that stores this entry, then depression of a dedicated or non-dedicated key that activates the processor means to determine an internal trading price range and resultant order size(s) for each price in the price range. numeric input means to enter a trading price range by entry of a low-price, followed by the depression of a dedicated or non-dedicated key to act as a separator, then entry of a high-price, followed by depression of a dedicated or non-dedicated key that activates processor means to determine the price range between previously entered low-price and high-price and resultant order size(s) for each price in the price range. numeric input means to enter a single trading price followed by depression of a dedicated or non-dedicated key that activates the processor means to determine a price range and resultant order size(s) by price, based upon previously entered price, cash, margin, and buying power previously stored amount(s), and display means to view and scroll through all order size(s) and price(s) in the price range with the first record displaying price previously entered and calculated order size; and display means for quickly viewing/and scrolling through order size(s) by price within a price range and displaying these order size(s) with associated price(s). display means for selectively displaying price(s) of the stored trading price range and resultant order size(s). look-up table means for storing numeric trading price(s) and price range(s), so that each individual trading price within the price range can be divided into the amount of previously entered cash, margin, and buying power total, to determine trade order size(s). look-up table means for storing numeric value(s) that are responsive to the processor means to calculate trading price(s), trading price range(s), and order size(s). said keyboard includes a dedicated or non-dedicated first command key operatively connected to the processing means for automatically initiating the operations of the processing means involving the price(s) previously entered and determining a trading price range where trade order size(s) are determined for each price in the price range by dividing the amount of cash, margin, or buying power previously entered by each price in the price range, generating the first display signal upon entry of the price(s).
 3. An electronic calculator as defined in claim 1 wherein the keyboard includes incremental “speed key(s)” and “up/down arrow scroll key(s)” operatively connected to the processing means for automatically initiating the operations of the processing means involving numeric values in the internal price set by the price previously entered through the keyboard, where the user can quickly change the previously entered price with positive and negative incremental price “speed key(s)” and “up/down arrow scroll keys” to arrive at a new price and obtain a new order size generating a display signal upon entry of the price(s) or depression of the “up/down arrow scroll keys” or “speed key(s)”. Method further comprising: numeric means to input positive and negative price increment(s) in either decimal or fractional format. input means for fractional and decimal price increment(s) that include “manual input” and “pre-defined input” methods using dedicated or non-dedicated digit entry key(s) or switch(es). input means that include speed key(s) that are dedicated or non-dedicated digit entry key(s), pre-defined or manual input, or any combination of dedicated and non-dedicated digit entry key(s) including pre-defined and manual input, such as up/down arrow key(s), positive and negative decimal increment key(s), number key(s), decimal key, second function key(s), slash (/) key, or any combination thereof. processing, storage, and display means to accommodate fractional or decimal price(s) and fractional or decimal price increment(s). display signal with corresponding order size(s) and associated price(s). display means for the numeric trading price(s) and price increment changes, enabling the trader to insure that same are accurately stored. numeric means to input positive and negative price increment(s) in either decimals or fractions, allowing the user to view/or scroll by price using decimal or fractional price increment(s). input, processor, storage, and display means that accommodates decimals and fractions for price increment(s). said keyboard includes a “Decimal—Fractional” selector switch for determining the mode of the device where the price(s) can either be in decimals or fractions. said keyboard includes a “Fractional Indicator” switch that involves the price(s) previously entered and determining trading price increment(s) where fractional increment(s) are added to the previously entered price(s) arriving at a new price(s) that is then used to determine trade order size(s) by dividing the amount of cash, margin, or buying power previously entered by the new price(s), generating a display signal upon entry of the price(s) or depression of the fractional “Up/Down Arrow Scroll Keys”. said keyboard includes a set of positive and negative decimal “Speed Keys” involving the price(s) previously entered and determining trading price increment(s) where decimal increment(s) are added to the previously entered price(s) arriving at a new price(s) that is then used to determine trade order size(s) by dividing the amount of cash, margin, or buying power previously entered by the new price(s), generating a display signal upon entry of the price(s) or depression of any of the decimal “speed keys”.
 4. An electronic calculator as defined in claim 2 wherein the keyboard includes incremental “speed key(s)” and “up/down arrow scroll key(s)” operatively connected to the processing means for automatically initiating the operations of the processing means involving numeric values in the internal price or price range set by the price previously entered through the keyboard, where the user can quickly change the previously entered price with positive and negative incremental price “speed key(s)” and “up/down arrow scroll keys” to arrive at a new price within the internal price range and obtain a new order size generating a display signal upon entry of the price(s) or depression of the “up/down arrow scroll keys” or “speed key(s)”. Method further comprising: numeric means to input positive and negative price increment(s) in either decimal or fractional format. input means for fractional and decimal price increment(s) that include “manual input” and “pre-defined input” methods using dedicated or non-dedicated digit entry key(s) or switch(es). input means that include speed key(s) that are dedicated or non-dedicated digit entry key(s), pre-defined or manual input, or any combination of dedicated and non-dedicated digit entry key(s) including pre-defined and manual input, such as up/down arrow key(s), positive and negative decimal increment key(s), number key(s), decimal key, second function key(s), slash (/) key, or any combination thereof. processing, storage, and display means to accommodate fractional or decimal price(s) and fractional or decimal price increment(s). display signal with corresponding order size(s) and associated price(s). display means for the numeric trading price(s) and price increment changes, enabling the trader to insure that same are accurately stored. numeric means to input positive and negative price increment(s) in either decimals or fractions, allowing the user to view/or scroll through a price range by decimal or fractional price increment(s). input, processor, storage, and display means that accommodates decimals and fractions for price(s) increment(s). said keyboard includes a “Decimal—Fractional” selector switch for determining the mode of the device where the price(s) can either be in decimals or fractions. said keyboard includes a “Fractional Indicator” switch that involves the price(s) previously entered and determining trading price increment(s) where fractional increment(s) are added to the previously entered price(s) arriving at a new price(s) that is then used to determine trade order size(s) by dividing the amount of cash, margin, or buying power previously entered by the new price(s), generating a display signal upon entry of the price(s) or depression of the fractional “Up/Down Arrow Scroll Keys”. said keyboard includes a set of positive and negative decimal “Speed Keys” involving the price(s) previously entered and determining trading price increment(s) where decimal increment(s) are added to the previously entered price(s) arriving at a new price(s) that is then used to determine trade order size(s) by dividing the amount of cash, margin, or buying power previously entered by the new price(s), generating a display signal upon entry of the price(s) or depression of any of the decimal “speed keys”.
 5. An electronic calculator that determines number of option(s) and contract(s) by premium, using cash, margin, and buying power stored amount(s), including multiplier. Said device comprising: a case; computer means mounted within the case including a) memory means containing information relating to a trading, premium(s) where said processor means being responsive to said storage means to divide a trading premium(s) into the previously entered cash, margin, or buying power total, then dividing this resultant number by the previously entered multiplier to calculate a final resultant number of option(s) or contract(s); and b) input entry means including a keyboard for manually entering a trading premium(s) and multiplier, and the amount of cash, margin, or buying power being traded; and c) processing means responsive to a trading premium entered through the keyboard using dedicated or non-dedicated key(s) to obtain a resultant number of option(s) or contract(s), which is equal to the amount of cash, margin, or buying power previously entered through the keyboard divided by premium(s) previously entered through the keyboard, then divided by multiplier previously entered, and for generating a first display signal corresponding to the resultant number of option(s) or contract(s) and premium(s); and numeric means for manually inputting amount(s) for cash, margin, buying power, and multiplier stored keys; and numeric means for manually inputting trading premium(s); and input means to select decimal or fractional mode of operation; and input means to modify/or clear the numeric trading premium(s) including amount(s) for cash, margin, buying power, and multiplier; and input means for fractional and decimal premium(s) that include “manual input” and “pre-defined input” methods using dedicated keys or non-dedicated digit entry key(s). input, processor, storage, and display means that accommodates decimals and fractions for determining premium(s) and number of option(s) or contract(s). processor means for calculating a number of option(s) or contract(s) for the previously entered premium(s), where said number of option(s) or contract(s) and premium(s) corresponds to the previously entered amount for cash, margin, and buying power, and multiplier, and at least calculating EQU1-3 and EQU8-13. processor means for rounding down the resultant number of option(s) or contract(s) to the next whole number and a display means for viewing this rounded number(s). processor means for determining an number of option(s) or contract(s) for the premium(s) previously entered through the keyboard, wherein said display means includes means for displaying the number of option(s) and premium(s) with descriptive acronyms. memory means for storing trading premium(s), and a processor means being responsive to said storage means to divide trading premium(s) into the previously entered amount of cash, margin, buying power, and multiplier to calculate a resultant trade number of option(s) or contract(s). display means for numbers indicative of the calculated number of option(s) or contract(s) including trading premium(s) and number of option(s) or contract(s), enabling the trader to review same. display means for selectively displaying stored trading premium(s) and calculated number of option(s) or contract(s). look-up table means for storing trade premium(s), so that trade premium(s) can be divided into the amount of previously entered cash, margin, buying power, and multiplier total, to determine number of option(s) or contract(s), at least calculating EQU1-3 and EQU23-29. look-up table means for storing numeric value(s) that are responsive to the processor means to calculate trading premium(s) and number of option(s) or contract(s). said keyboard includes a dedicated or non-dedicated first command key operatively connected to the processing means for automatically initiating the operations of the processing means involving the premium(s) previously entered and determining a number of option(s) or contract(s) by dividing the amount of cash, margin, buying power, and multiplier previously entered by premium(s) previously entered, generating the first display signal upon entry of the premium(s). processor means at least calculating EQU1 through EQU84, and also calculating each variable of each equation EQU1 through EQU84 that can be stored and displayed
 6. An electronic calculator as defined in claim 5 wherein trade premium(s) can be calculated between a maximum and minimum trading premium with a resultant trading premium range and means for calculating number of option(s) or contract(s) for each trading premium(s) within the premium range. numeric means for manually inputting a trading premium range or processor means internally determining a premium range from the premium previously entered by user; and means for manually inputting numbers to modify/or clear the numeric trading premium range including amount(s) for cash, margin, buying power, and multiplier. storage means wherein there exists a maximum number of records in an internal premium range determined by the premium previously entered through the keyboard; storage means for storing individual trading premiums from the trading premium range, said processor means being responsive to said storage means to divide each trading premium of the premium range into the previously entered amount of cash, margin, buying power, and multiplier to calculate the resultant number of option(s) or contract(s). processing, storage, and display means to accommodate fractional or decimal premiums within the premium range. processor means for calculating number of option(s) or contract(s) for each premium in the premium range, each of said number of option(s) or contract(s) and premium corresponding to the inputted numeric amount for cash, margin, buying power, and multiplier, and at least calculating EQU1-3 and EQU8-13. processor means for rounding down the resultant number of option(s) or contract(s) to the next whole number, for each number of option(s) or contract(s) calculation within the premium range, and a display means for viewing each rounded number. processor means for determining the number of option(s) or contract(s) for each premium within the premium range, wherein said display means includes means for displaying the number of option(s) or contract(s) and premium with descriptive acronyms. processor means that determines an internal premium range from the premium previously entered, and an input and display means to view and scroll through premium(s) and associated number of option(s) or contract(s) in the premium range. processor means that determines an internal premium range from the previously entered high-premium and low-premium of the premium range, and a display and input means to view and scroll through premium(s) and associated number of option(s) or contract(s) in the premium range. numeric input means using dedicated or non-dedicated key(s) or switch(es), or a combination of dedicated and non-dedicated key(s) or switch(es), to enter a trading premium range by entry of a single trading premium, then depression of a dedicated or non-dedicated key that activates the processor means to determine an internal trading premium range and resultant number of option(s) or contract(s) for each premium in the premium range. numeric input means to enter a trading premium range by entry of a low-premium followed by the depression of a dedicated or non-dedicated key that stores this entry, then entry of a high-premium followed by the depression of a dedicated or non-dedicated key that stores this entry, then depression of a dedicated or non-dedicated key that activates the processor means to determine an internal trading premium range and resultant number of option(s) or contract(s) for each premium in the premium range. numeric input means to enter a trading premium range by entry of a low-premium, followed by the depression of a dedicated or non-dedicated key to act as a separator, then entry of a high-premium, followed by depression of a dedicated or non-dedicated key that activates processor means to determine the premium range between previously entered low-premium and high-premium and resultant number of option(s) or contract(s) for each premium in the premium range. numeric input means to enter a single trading premium followed by depression of a dedicated or non-dedicated key that activates the processor means to determine a premium range and resultant number of option(s) or contract(s) by premium, based upon previously entered premium, cash, margin, buying power, and multiplier previously stored amount(s), and display means to view and scroll through all number of option(s) or contract(s) and premium(s) in the premium range with the first record displaying premium previously entered and calculated number of option(s) or contract(s); and display means for quickly viewing/and scrolling through number of option(s) or contract(s) by premium within a premium range and displaying these number of option(s) or contract(s) with associated premium(s). display means for selectively displaying premium(s) of the stored trading premium range and resultant number of option(s) or contract(s). look-up table means for storing numeric trading premium(s) and premium range(s), so that each individual trading premium within the premium range can be divided into the amount of previously entered cash, margin, buying power, and multiplier total, to determine number of option(s) or contract(s), at least calculating EQU1-3 and EQU23-29. look-up table means for storing numeric value(s) that are responsive to the processor means to calculate trading premium(s), trading premium range(s), and number of option(s) or contract(s). said keyboard includes a dedicated or non-dedicated first command key operatively connected to the processing means for automatically initiating the operations of the processing means involving the premium(s) previously entered and determining a trading premium range where number of option(s) or contract(s) are determined for each premium in the premium range by dividing the amount of cash, margin, buying power, and multiplier previously entered by each premium in the premium range, generating the first display signal upon entry of the premium(s).
 7. An electronic calculator as defined in claim 5 wherein the keyboard includes incremental “speed key(s)” and “up/down arrow scroll key(s)” operatively connected to the processing means for automatically initiating the operations of the processing means involving numeric values in the internal premium set by the premium previously entered through the keyboard, where the user can quickly change the previously entered premium with positive and negative incremental premium “speed key(s)” and “up/down arrow scroll keys” to arrive at a new premium and obtain a new number of option(s) or contract(s) generating a display signal upon entry of the premium(s) or depression of the “up/down arrow scroll keys” or “speed key(s)”. Method further comprising: numeric means to input positive and negative premium increment(s) in either decimal or fractional format. input means for fractional and decimal premium increment(s) that include “manual input” and “pre-defined input” methods using dedicated or non-dedicated digit entry key(s) or switch(es). input means that include speed key(s) that are dedicated or non-dedicated digit entry key(s), pre-defined or manual input, or any combination of dedicated and non-dedicated digit entry key(s) including pre-defined and manual input, such as up/down arrow key(s), positive and negative decimal increment key(s), number key(s), decimal key, second function key(s), slash (/) key, or any combination thereof. processing, storage, and display means to accommodate fractional or decimal premium(s) and fractional or decimal premium increment(s). display signal with corresponding number of option(s) or contract(s) and associated premium(s). display means for the numeric trading premium(s) and premium increment changes, enabling the trader to insure that same are accurately stored. numeric means to input positive and negative premium increment(s) in either decimals or fractions, allowing the user to view/or scroll by premium using decimal or fractional premium increment(s). input, processor, storage, and display means that accommodates decimals and fractions for premium increment(s). said keyboard includes a “Decimal—Fractional” selector switch for determining the mode of the device where the premium(s) can either be in decimals or fractions. said keyboard includes a “Fractional Indicator” switch that involves the premium(s) previously entered and determining trading premium increment(s) where fractional increment(s) are added to the previously entered premium(s) arriving at a new premium(s) that is then used to determine number of option(s) or contract(s) by dividing the amount of cash, margin, buying power, and multiplier previously entered, by the new premium(s), generating a display signal upon entry of the premium(s) or depression of the fractional “Up/Down Arrow Scroll Keys”. said keyboard includes a set of positive and negative decimal “Speed Keys” involving the premium(s) previously entered and determining trading premium increment(s) where decimal increment(s) are added to the previously entered premium(s) arriving at a new premium(s) that is then used to determine number of option(s) or contract(s) by dividing the amount of cash, margin, buying power, and multiplier previously entered by the new premium(s), generating a display signal upon entry of the premium(s) or depression of any of the decimal “speed keys”.
 8. An electronic calculator as defined in claim 6 wherein the keyboard includes incremental “speed key(s)” and “up/down arrow scroll key(s)” operatively connected to the processing means for automatically initiating the operations of the processing means involving numeric values in the internal premium or premium range set by the premium previously entered through the keyboard, where the user can quickly change the previously entered premium with positive and negative incremental premium “speed key(s)” and “up/down arrow scroll keys” to arrive at a new premium within the internal premium range and obtain a new number of option(s) or contract(s) generating a display signal upon entry of the premium(s) or depression of the “up/down arrow scroll keys” or “speed key(s)”. Method further comprising: numeric means to input positive and negative premium increment(s) in either decimal or fractional format. input means for fractional and decimal premium increment(s) that include “manual input” and “pre-defined input” methods using dedicated or non-dedicated digit entry key(s) or switch(es). input means that include speed key(s) that are dedicated or non-dedicated digit entry key(s), pre-defined or manual input, or any combination of dedicated and non-dedicated digit entry key(s) including pre-defined and manual input, such as up/down arrow key(s), positive and negative decimal increment key(s), number key(s), decimal key, second function key(s), slash (/) key, or any combination thereof. processing, storage, and display means to accommodate fractional or decimal premium(s) and fractional or decimal premium increment(s). display signal with corresponding number of option(s) or contract(s) and associated premium(s). display means for the numeric trading premium(s) and premium increment changes, enabling the trader to insure that same are accurately stored. numeric means to input positive and negative premium increment(s) in either decimals or fractions, allowing the user to view/or scroll through a premium range by decimal or fractional premium increment(s). input, processor, storage, and display means that accommodates decimals and fractions for premium(s) increment(s). said keyboard includes a “Decimal—Fractional” selector switch for determining the mode of the device where the premium(s) can either be in decimals or fractions. said keyboard includes a “Fractional Indicator” switch that involves the premium(s) previously entered and determining trading premium increment(s) where fractional increment(s) are added to the previously entered premium(s) arriving at a new premium(s) that is then used to determine number of option(s) or contract(s) by dividing the amount of cash, margin, buying power, and multiplier previously entered by the new premium(s), generating a display signal upon entry of the premium(s) or depression of the fractional “Up/Down Arrow Scroll Keys”. said keyboard includes a set of positive and negative decimal “Speed Keys” involving the premium(s) previously entered and determining trading premium increment(s) where decimal increment(s) are added to the previously entered premium(s) arriving at a new premium(s) that is then used to determine number of option(s) or contract(s) by dividing the amount of cash, margin, buying power, and multiplier previously entered by the new premium(s), generating a display signal upon entry of the premium(s) or depression of any of the decimal “speed keys”.
 9. An electronic calculator that determines unknown/or not stored variables for a variety of option(s) trade calculations to solve option(s) trading tasks. Said calculator comprising: numeric means for inputting option trade variables (number of options/calls or puts, premium, strike price, number of shares, multiplier, settlement value-automatic, settlement value non-automatic, cap interval, cap price, in money, total option dollar amount, # of options, premium per share, exercise price, etc.) Please refer to description of keys. display means for viewing the calculated/or stored option trading variables (number of options/calls or puts, premium, strike price, number of shares, multiplier, settlement value-automatic, settlement value non-automatic, cap interval, cap price, in money, total option dollar amount, # of options, premium per share, exercise price, etc. means for displaying numeric option variables, enabling the trader to insure that same are accurately stored. processor means for individually determining an options trading variable (number of options/calls or puts, premium, strike price, number of shares, multiplier, settlement value-automatic, settlement value non-automatic, cap interval, cap price, in money, total option dollar amount, # of options, premium per share, exercise price, etc.) that was not stored/unknown by at least calculating EQU4,6,8,10,27-29,33,34. storage means for storing option trading variables from numeric option input means, said processor means being responsive to said storage means to calculate individual variables of an options trade that were not stored/unknown. processor means for rounding (up or down) each calculation to the next whole number. means for displaying numbers indicative of the calculated trade option variables, enabling the trader to review same. means for manually inputting numbers to modify/or clear option trade variables/or functions including pre-set amount for cash, margin, or total buying power. means for determining option trade variables for each calculation, wherein said display means includes means for displaying the option trade variables with descriptive acronyms. processor means that determines a variety of trade option variables for American and European option types. input means further includes means for overriding/or clearing option variable input enabling the trader to redefine/re-input these variables. processor means at least calculating EQU1 through EQU84, and also calculating each variable of each equation EQU1 through EQU84 that can be stored and displayed
 10. An electronic calculator that determines unknown/or not stored variables for a variety of margin, percentage, and cash flow calculations that have been modified specifically to solve trading and investment tasks for all types of securities. Said calculator comprising: numeric means for inputting rate of return variables (FMRR %, IRR %, MIRR %, Net Present Value NPV, gain and loss, total dividends, average quarterly dividends, yield %, fees, total tax %, federal & state tax %, purchase price, current price, number of shares, term, current share price, etc.). processor means for individually determining each rate of return (internal rate of return and financial mgmt rate of return) variable (FMRR %, IRR %, gain and loss, total dividends, average quarterly dividends, yield %, fees, total tax %, federal & state tax %, purchase price, current price, number of shares, term, current share price, etc.) that was not stored/unknown by at least calculating EQU5,7,9,11,23-26,36-38,51-62,63-84. processor means to determine an income stream and nominal interest rate when calculating the internal rate of return. Means to calculate and re-calculate the present value of an income stream, as the discount rate is changed. The calculator will automatically set the net present value as close to zero as possible, thereby determining the internal rate of return. display means for viewing the calculated/or stored rate of return (internal rate of return and financial mgmt rate of return) variable (FMRR %, IRR %, gain and loss, total dividends, average quarterly dividends, yield %, fees, total tax %, federal & state tax %, purchase price, current price, number of shares, term, current share price, etc.) that was stored or not stored/unknown. processor means for rounding (up or down) each calculation to the next whole number. means for displaying numeric rate-of-return variables, enabling the trader to insure that same are accurately stored. storage means for storing rate of return trading variables, from numeric rate of return input means, said processor means being responsive to said storage means to calculate individual variables for rates of return that were not stored/unknown. means for displaying numbers indicative of the calculated rate of return variables, enabling the trader to review same. means for manually inputting numbers to modify/or clear rate-of-return variables/or functions including pre-set amount for cash, margin, or total buying power. means for determining rate-of-return trade variables for each calculation, wherein said display means includes means for displaying the rate-of-return variables with descriptive acronyms input means further includes means for overriding/or clearing rate-of-return input enabling the trader to redefine/re-input these variables. processor means at least calculating EQU1 through EQU84, and also calculating each variable of each equation EQU1 through EQU84 that can be stored and displayed 